Beautyrest
Beautyrest Black® Series Two 15.5" Medium Mattress
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The honest verdict: the Series Two Medium is the universal true-medium feel with the Series Two upgrades and none of the extras you don't need. At a genuine 5 out of 10 it works for back, side, and combination sleepers, and over Series One it adds named cooling tech and a deeper, more contouring comfort layer on a taller 15.5-inch build. If you want the well-rounded Black medium with the Series Two cooling but don't need the Apex Top edge feature, this is the clean pick.
What it's made of, and what that does for you
The build reads from the top down: a Sleep Climate quilting layer with SurfaceTouch Gel Memory Foam quilted into the surface, a deeper Beautyrest Gel Memory Foam comfort layer plus Micro Diamond Memory Foam for cooling, all carried on a true-medium Triple-Stranded Pocketed Coil core tuned to a real 5 out of 10.
- A true medium (about 5/10). The most universal firmness: contour where you press, support where you don't, comfortable across sleep positions.
- Micro Diamond Memory Foam cooling. A memory foam infused with heat-conducting diamond particles that pulls warmth away from your body, the named upgrade that makes Series Two sleep cooler than Series One.
- SurfaceTouch Gel Memory Foam, quilted into the surface. Pressure relief that starts the moment you lie down, not three layers deep.
- Triple-Stranded Pocketed Coil core. Individually-wrapped coils carry the support and isolate a partner's movement, so a restless sleeper barely registers across the bed.
- Taller 15.5-inch build, CertiPUR-US certified foams, 10-year limited warranty. More comfort layer than the Series One mediums, on the premium Black coil core.
What you notice lying on it
The first impression is balance. You settle into the comfort layer enough to feel cradled at the shoulder and hip, then the coil core catches you before you bottom out, so your spine stays in line on your back or your side. The Series Two cooling is something you feel rather than read about: the Micro Diamond foam and the breathing coils pull heat away instead of trapping it the way an all-foam bed can.
Who it suits, and who it doesn't
This is the all-rounder, upgraded. Back and combination sleepers are the natural fit, since a true medium with deeper contour covers the widest range of positions, and side sleepers get enough give at the shoulder and hip. Couples with two different sleep styles tend to land here too, because medium is the safest compromise. If you run warm, the Micro Diamond cooling is aimed squarely at that.
It is not the bed for everyone, and it is better to say so now. If you use the full width or sit on the edge a lot, the Apex Top Medium adds reinforced edge support for more usable surface and a steadier perch. If you want the most accessible Black medium, the Series One Medium is the same true-medium feel without the Series Two cooling and contour upgrades. And if you specifically want plush or firm, medium is the middle, with those models bracketing it.
Living with it
Coming from an older or sagging bed, the difference people notice first is steadiness, since the wrapped coils support each part of you independently rather than moving as one sheet. Measure the 15.5-inch height against your frame and reach for deep-pocket sheets. It is compatible with an adjustable base, and the CertiPUR-US certified foams and 10-year limited warranty are there for the long run.
Come lie on it in Kentucky before you commit
Locally owned and serving Kentucky since 2012, Mattress Overstock runs five showrooms you can actually walk into: Lexington (on Nicholasville Road), Georgetown, Somerset, London, and Richmond, rated about 4.7 stars across 535 Google reviews. "Medium" feels different bed to bed, and the Micro Diamond cooling is something you feel, not read. Come compare this against the Series One Medium and the Apex Top in your own sleeping position, this week, at the showroom nearest you.
When you're ready, select your size to see the live Mattress Overstock price. You get a 100-day comfort guarantee; if it isn't right, exchange it for store credit toward any bed of equal or greater value (no cash refund, but no restocking-fee games either). Free local delivery, free setup, and the old mattress hauled away. And because everyone on the floor is paid the same regardless of which brand you choose, the guidance you get is honest.
Feel the mediums across every tier in the full Beautyrest Black lineup.
What makes this mattress different
The well-rounded Series Two medium
A true 5-out-of-10 medium with the Series Two cooling and a deeper comfort layer: the universal feel, upgraded.
Micro Diamond Memory Foam cooling
Memory foam infused with heat-conducting diamond particles pulls warmth away from the body, the named upgrade that makes Series Two sleep cooler than Series One.
SurfaceTouch Gel Memory Foam, quilted in
Gel memory foam quilted right into the surface, so pressure relief starts the moment you lie down.
Triple-Stranded Pocketed Coil core
Individually-wrapped coils carry the support and deliver Black's signature motion separation, so a partner's movement barely crosses the bed.
A true medium for any sleep style
Contour where you press, support where you don't: back, side, and combination sleepers all land comfortably at a real 5/10.
Taller 15.5-inch build, 10-year warranty
More comfort layer than the Series One mediums, on the premium Black coil core with CertiPUR-US certified foams.
The universal medium, with the Series Two cooling step-up
The Series Two Medium reads from the top down: a Sleep Climate™ quilting layer with SurfaceTouch™ Gel Memory Foam quilted directly into the surface for immediate pressure relief, then a deeper Beautyrest® Gel Memory Foam comfort layer with Micro Diamond™ Memory Foam for cooling, all carried on the true-medium Triple-Stranded Pocketed Coil® core, tuned to a genuine 5-out-of-10 medium.
Micro Diamond™ Memory Foam is infused with heat-conducting diamond particles that move warmth away from your body, the named reason Series Two sleeps cooler than Series One, alongside a deeper, more contouring comfort layer on a taller build. What you don't get (and don't pay for) is the Apex Top edge reinforcement. The pocketed coils keep motion separation strong either way.
If edge support matters, the Apex Top Medium adds it; for the entry-tier medium feel, the Series One Medium. Full range in the Beautyrest Black lineup.
Shop the Beautyrest Black lineup →What's inside Beautyrest Black
Five layers, engineered together: a cool quilted surface, pressure-relieving gel foam, and the Triple-Stranded Pocketed Coil® core that defines the Black line.
The all-rounder, upgraded
Back sleepers: a true medium holds your lumbar in line while the comfort layer takes the edge off, the safest single pick if you split your night between positions.
Side sleepers: enough give at the shoulder and hip to relieve pressure, with the coil core stopping you before you sink too far.
Combination sleepers: the deeper Series Two contour covers the widest range of positions, so rolling from back to side never finds a hard spot.
Couples with different styles: medium is the safest compromise, and the Triple-Stranded Pocketed Coils keep one person's movement from crossing the bed.
Hot sleepers: the Micro Diamond™ Memory Foam and breathing coils target heat directly, the main reason to step up from Series One.
Probably not for you if: you want edge support (the Apex Top Medium), the most accessible Black medium (the Series One Medium), or a specifically plush or firm feel rather than the middle.
Specifications
| Height | 15.5" |
|---|---|
| Feel | Medium |
| Firmness | 5 out of 10 (10 = firmest) |
| Construction | Sleep Climate™ quilting over a deeper Beautyrest® Gel Memory Foam comfort layer and a true-medium Triple-Stranded Pocketed Coil® core: 15.5 inches, medium. |
| Cooling | Series Two enhanced cooling: Sleep Climate™ quilting and Beautyrest® Gel Memory Foam over a Triple-Stranded Pocketed Coil core that breathes more than all-foam. |
| Motion isolation | Excellent. Triple-Stranded Pocketed Coils move independently, so a partner's movement barely crosses the bed. |
| Adjustable base | Yes, compatible with adjustable bases |
| Certifications | CertiPUR-US certified foams |
| Warranty | 10-year limited warranty |
| Trial period | 100 days at Mattress Overstock |
Frequently asked questions
How firm is the Series Two Medium?
A true medium, about 5 out of 10, with the Series Two deeper contour and added Micro Diamond™ cooling. Comfortable for back, side, and combination sleepers.
What makes Series Two cooler than Series One?
Micro Diamond™ Memory Foam: a memory foam infused with heat-conducting diamond particles designed to move warmth away from your body, layered with the breathing pocketed-coil core. It's the named cooling upgrade over Series One, and it's something you feel rather than read about.
How is it different from the Apex Top Medium?
Same true-medium feel; the Apex Top Medium adds reinforced edge support for more usable surface and a steadier side. If you use the full width or sit on the edge often, the Apex is worth it; otherwise this is the clean medium.
How is Series Two different from Series One?
Added Micro Diamond™ cooling, a deeper comfort layer, and a taller build. The Series One Medium is the same true-medium feel at the more accessible tier.
Is it good for couples?
Yes. Medium is the most reliable compromise between two sleep styles, and the Triple-Stranded Pocketed Coils move independently, so one partner shifting or getting up barely registers on the other side.
Will it work with my adjustable base?
Yes, it's compatible with an adjustable base. At 15.5 inches it's a taller build, so measure against your frame and pick up deep-pocket sheets.
What certifications and warranty does it carry?
The foams are CertiPUR-US certified, and it carries a 10-year limited warranty.
How do delivery and the comfort guarantee work?
Free local delivery across our Kentucky service area with our own team, usually next business day when your size is in stock, plus free setup and old-mattress haul-away. You also get a 100-day comfort guarantee: if the feel isn't right, exchange it for store credit toward any bed of equal or greater value (no cash refund).
Can I see this mattress in person near me?
Yes, and with a mattress, that's the better way to buy. Mattress Overstock is a Kentucky-owned company that has served the state since 2012, with five showrooms you can visit: Lexington (on Nicholasville Road), Georgetown, Somerset, London, and Richmond, rated about 4.7 stars across 535 Google reviews. Come lie on this exact mattress in your own sleeping position before you decide. Because everyone on the floor is paid the same no matter which brand you choose, the guidance you get is honest.
How does it compare to the rest of the Black line?
Series Two sits a tier above Series One (added cooling and contour) and below Series Three and Four (which add micro-coil layers for more conforming support). Within Series Two, this standard medium is the clean middle; the Apex Top adds edge support, and plush and firm models bracket the feel. Compare them in the full Beautyrest Black lineup.
Buy it from people you can actually visit
- Free local delivery To your home across Central & Eastern Kentucky.
- Free setup We place and set up your new bed in the room.
- Free old-mattress haul-away The old one goes out the same day the new one comes in.
Independently owned in Kentucky since 2012. Walk in any day (no appointment) and someone who actually knows the floor will help you find the right fit.
Still deciding?
Try it in person at any Kentucky showroom
Walk into any Mattress Overstock location, lie down, and feel the difference yourself. No appointment, no pressure. Our team has over 100 years of combined mattress experience and we're here to help you find the right fit.
